Amazon Redshift now utilizes the late materialization to lessen the quantity of data scanned and enhanced the performance of queries with the implied filters. Late materialization row-level filtering decreases I/O for queries with filters by factoring and batching in the filtering of predicate before searching data blocks in the next column. Amazon Redshift with late materialization fetches a group of data CUSTOMER_STATUS_LEVEL and CUSTOMER_SINCE_DATE then implement the particular predicates. If the 10 percent of the CUSTOMER_DETAIL table rows content the predicate filters so as a result, Amazon Redshift can possibly save 90 percent of the I/O for the remaining columns that ultimately improves the query performance.
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